对2年生花榈木容器苗进行随机取样调查,测定有根瘤和无根瘤花榈木的生长及生理生化指标,分析根瘤菌对花榈木苗木生长及生理的影响。结果表明,根瘤菌显著地促进了2年生花榈木的生长,有根瘤的花榈木与无根瘤的相比,其苗高、地径、总根长、总根表面积、总根体积分别增长8.5%、17.6%、48.0%、45.6%和42.4%,其总生物量是无根瘤苗木的1.38倍。根瘤菌对花榈木苗木根生长的影响大于茎叶生长。与无根瘤的花榈木苗木相比,有根瘤的花榈木苗木光合速率增加,蒸腾速率降低,水分利用效率和光能利用率明显提高,其叶绿素荧光参数在一定程度上均有所提高。根瘤菌对花榈木的叶绿素含量、硝态氮含量、硝酸还原酶活性、根系活力等生化指标影响极显著,其值分别比无根瘤的花榈木增大42.9%、6.2%、39.2%和48.7%。

In order to investigate the effect of rhizobia on the growth physiology of Ormosia henryi seedlings , the growth indices and some physiological-biochemical indices of seedlings with root nodules and without root nodules were surveyed by randomly sampling of biennial Ormosia henryi container seedlings .The results showed that , com-pared with biennial Ormosia henryi container seedlings without nodules , rhizobia significantly facilitated the growth of container seedlings in terms of the height , ground diameter , total root length , total root surface area , total root val-ume, and increased amount reaches to 8.5%, 17.6%, 50%, 45.6%and 42.4%respectively .The gross bi-omass of seedlings with root nodules was 1.38 times of those without root nodules .There is greater effect of nodules on root growth than on leaf and stem.Compared with Ormosia henryi seedlings without nodules , the photosynthetic rate of seedlings with nodules increased , transpiration rate decreased , water use efficiency

以‘泰山’木绣球（ Viburnum macrocephalum ‘Taishan ’）为母本，荚蒾‘蒂娜’（ Viburnum dilatatum‘Dina’）为父本，采用6种授粉方式（以常规授粉方式作对照）对‘泰山’木绣球授粉，初步探讨种间杂交的亲和性。结果表明，6种授粉方式中，以重复授粉坐果率最高，达66．7％。‘泰山’木绣球花有二型：大部分单性花是不育花，只有一部分两性花是可育花。初步确定‘泰山’木绣球不育的原因是雄蕊退化或雌蕊发育不全。F1代形态指标介于父母本之间，初步确定F1是由‘泰山’木绣球与荚蒾‘蒂娜’杂交获得。

With Viburnum macrocephalum‘Taishan’ as female parent and Viburnum dilatatum ‘Dina’ as male parent , the distant hybridization was carried out to study the compatibility of distant hybridization .Six different pollination methods were used , and the common pollination method was used as control .The results showed that the fruiting rate of duplicate pollination was the highest among the 6 pollination methods , which was 66.7%.Viburnum macrocephalum‘Taishan’ had two types of floral organs:most were sterile and only a part was fertile .Stamen abortion and pistil dysgenesis may be the main factors resulting in infertility of Vibur-num macrocephalum.The morphological indicators of F 1 were between those of female and male parents , which indicated F1 be obtained from the hybridization between ‘Taishan’ and ‘Dina’.

[目的]为植物的抗旱栽培提供依据。[方法]在温室内模拟自然干旱条件,通过测定灰叶铁线莲、柠条、花棒、醉鱼木4种旱生植物幼树叶片的永久萎蔫系数,对其进行抗旱能力比较。[结果]灰叶铁线莲、柠条、花棒和醉鱼木分别在土壤含水量为3.49%、3.59%、3.63%、3.38%时叶片开始萎蔫,在土壤含水量达到1.51%、1.53%、1.68%、1.57%时产生永久萎蔫。说明灰叶铁线莲表现出与其他旱生植物花棒、柠条、醉鱼木相同的耐旱性。[结论]灰叶铁线莲、柠条、花棒和醉鱼木幼树叶片的永久萎蔫系数分别为1.51%、1.53%、1.68%、1.57%,4种植物的耐旱性相近。

[Objective]The paper was to provide reference for cultivation of plant with drought resistance.[Method]With simulation of natural drought conditions in the greenhouse,the permanent wilting coefficients of leaves in four kinds of xerophytic plant seedlings containing Clematis canescens,Caragana intermedia,Hedysarum scoparium and Buddleja alternifolia were measured,and their drought resistances were compared.[Result]When the soil moistures were 3.49%,3.59%,3.63% and 3.38%,the leaves of C.canescens,C.intermedia,H.scoparium and B.alternifolia began to wilt,which produced permanent wilting as the soil moistures were 1.51%,1.53%,1.68% and 1.57%.This indicated that C.canescens showed the same drought resistance with other three plants.[Conclusion]The permanent wilting coefficients of the leaves of C.canescens,C.intermedia,H.scoparium and B.alternifolia were 1.51%,1.53%,1.68% and 1.57%,respectively.The drought tolerance of four kinds of plants was similar.

[目的]旨在探明赣湘鄂三省主产区籽莲访花昆虫种类、数量以及访花昆虫群落结构。[方法]采用样地调查法及定点网捕法先后在江西省石城县、湖南省临湘市、湖北省咸宁市、华中农业大学荷花园调查荷花访花昆虫种类和数量，并采用多样性指数（H′），均匀度指数（ J）和优势集中性指数（ C）进行多样性分析。[结果]①荷花主要传粉昆虫为膜翅目昆虫，西方蜜蜂，中华蜜蜂、中华木蜂、紫木蜂和黄胸木蜂；②温度是影响荷花访花昆虫采集活动的主要因素；③荷花主要传粉昆虫的日活动规律为单峰型和双峰型，黄胸木蜂和中华木蜂呈现双峰型，西方蜜蜂、中华蜜蜂和紫木峰呈现单峰型；④湖南临湘和湖北咸宁调查地野生传粉昆虫比例仅为20.59%，3.90%，访花昆虫种类分别为6种和3种；江西石城和华中农业大学野生传粉昆虫比例为55.61%，90.40%，访花昆虫种类为13种和12种；⑤各样点荷花访花昆虫群落的多样性指数和均匀度指数特征值为江西石城县>华中农大荷花园>湖南临湘>湖北咸宁，优势集中性指数的特征值比较为江西石城县<华中农大荷花园<湖南临湘<湖北咸宁，各调查点的多样性指数、均匀度指数和丰富度指数表现一致。[结论]不同生态区域荷花访花昆虫种类和数量不同，湖南临湘和湖北咸宁野生传粉昆虫数量稀少，荷花增产丰收必须依靠蜜蜂授粉。

[Objective]This study aimed to investigate the community structure, species and quantities of flower-visiting insects of seed lotus in main producing ar-eas of Jiangxi, Hunan and Hubei provinces. [Method] Using sample area survey and netting method in the fixed points to investigate species and quantities of Asian sacred lotus, the species diversity of different locations was evaluated by diversity indices (H′), evenness indices (J) and dominant concentration indices (C). [Result] Apis mel ifera, Apis cerana cerana, Xylocopa (Koptortosoma) sinensis, Xylocopa (s.str.) valga and Xylocopa (Al oxylocopa) appendiculata, al of which belong to order Hy-menoptera were the main pol inators of lotus. Temperature was the main factor which influenced the foraging behaviors of flower-visiting insects. The daily activities of X. (s.str.) valga and X. (Al oxylocopa) appendiculata were bimodal, and that of A. mel-lifera, A. cerana cerana and X. (s.str.) valga were unimodal. The percentage of wild pol

选择无瓣海桑、秋茄、白骨壤、木榄、桐花和拉关木6个红树林树种,在粤东沿海沙质滩涂地带进行造林试验。结果表明:(1)涨退潮风浪大的流动沙质滩涂不适宜种植红树林,避风、涨退潮海浪较小、沙土流动较缓慢的沙质滩涂可以成功造林;(2)种植后14个月,6个红树林树种造林存活率排序为白骨壤(31%)拉关木(28%)无瓣海桑(25%)秋茄(22%)桐花(18%)木榄(14%),平均保存率为23%;(3)在风浪较小、沙土流动较缓慢的沙质滩涂营造红树林,可选择无瓣海桑、白骨壤和拉关木3个树种。

The afforestation test of mangrove species,including Sonneratia apetala,Kandelia candel,Ari-cennia marina,Bruguiera gymnoihiza,Aegiceras corniculatum and Laguncularia racemosa were carried out in sandy beaches of eastern Guangdong.The results were as follows:The mangrove species were not suitable for flowing sandy beaches with huge tide waves.The lee and tardy sandy beaches with less tide waves could be suitable for af-forestation.The survival rate of six mangrove species after 1 4 months of planting was Aricennia marina (31%)>L.racemosa (28%)>S.apetala (25%)>K.candel (22%)>Aegiceras corniculatum (1 8%)>B.gym-noihiza (1 4%),and the average survival rate was 23%.Aricennia marina,L.racemosa and S.apetala were suit-able for growing in the lee and tardy sandy beaches with less tide waves.